Feeling sick after bd( just a little tmi)

So for About 2 weeks now every other time my fiance and i have sex afterwards i get really sick and i run to the bathroom..sometimes vomit sometimes #2 maybe both lady for about 15 minutes and then goes away like nothing happened...dont know whats wrong or what it could be dont have a doctor's appointment for another month.af due on the 2nd. Any advice?